Project SNEAKY FRACTION QUIZZER

Transcription

1 6 SNEAKY MATH: A Graphic Primer with Projects Project SNEAKY FRACTION QUIZZER Make your own Sneaky Fraction Quizzer to practice your fraction calculating skills. (And later, give it away to a young math student.) pencil tape scissors paper What s Needed U Thick paper or cardboard U Paper clip or a brass paper fastener U CD or DVD or a compass U Scissors or paper cutter tool U Paper U Pencil U Transparent tape paper clip CD or DVD You can use the illustrations on the next pages as a guide or photocopy the pages, paste them on the cardboard, and cut out the shapes shown in FIGURES through 6. First, trace a disc the size of a CD or DVD, or use a compass to create a circle with a diameter of inches, as shown in FIGURE. Next, cut out the rectangular cover shown in FIGURE, including the window hole. Or, you can run a pen firmly along the dotted lines to cut away the window section. SneakyMath_printer.indd 6

2 Arithmetic Fold the cover in half and puncture a hole in the front as shown in FIGURE. Also puncture a hole in the center of the disc, as shown in FIGURE. Place the disc in the cover and see how the upper one allows you to view the solution when its rectangular opening is properly dialed, as shown in FIGURE. Carefully push the brass paper fastener or paper clip from the outside of the cover and through the disc. Dial the disc around to match an equation and view the answer through the window. See FIGURE 6. FIGURE FIGURE Cut out window Cut out disc FIGURE FIGURE Punch a hole Punch a hole FIGURE 6 FIGURE SneakyMath_printer.indd

3 ADDED MULTIPLIED DIVIDED Fractions are part of a whole cut along dotted line SNEAKY FRACTIONS SNEAKY MATH: A Graphic Primer with Projects SneakyMath_printer.indd 8

4 ( ) $ ( * ( ) $ ( $ & Flip x = x = = x 0 DIVIDING FRACTIONS Reduces to ' x = x = = x X MULTIPLYING FRACTIONS = & + Find a common denominator. # $%! + ADDING FRACTIONS Convert a MIXED FRACTION into an IMPROPER FRACTION = = + x x + ( ) Convert an IMPROPER FRACTION into a MIXED FRACTION. = = 0 SneakyMath_printer.indd 9

5 0 SNEAKY MATH: A Graphic Primer with Projects Enlarge on a copier % SneakyMath_printer.indd 0

6 Arithmetic MATH CARD CONSTRUCTION TIPS In case you do not have (or want to use) a knife or a brass paper fastener, here s how to quickly cut out the window of the math card with scissors and use a paper clip to attach the disc. You can cut out the window section of the math card with scissors. Start at a side closest to the section to remove, as shown in FIGURE. FIGURE To avoid using a knife when cutting a window in the math cards, just use scissors and cut from one side. FIGURE Apply transparent tape across the slit. Then apply a thin layer of transparent tape to the inside of the card to secure the math card. See FIGURE. SneakyMath_printer.indd

7 SNEAKY MATH: A Graphic Primer with Projects FIGURE FIGURE Loop Paper clip If you do not want to use a brass paper fastener, you can bend a paper clip and use it to secure the disc inside the math card. Bend a paper clip into this shape with a -inch loop bent over on one end. FIGURE shows a paper clip, which, when bent straight with a small loop at one end, can substitute for a paper fastener. See FIGURE. Simply push the two ends of the paper clip through the hole on the front of the math card and also through the disc. See FIGURE. Secure the two ends to the back of the disc with tape, as shown in FIGURE 6. Now the paper clip allows you to turn the disc around freely. See FIGURE. Tape FIGURE FIGURE 6 Disc Disc Legs of paper clip Math card (reverse side) Math card (front side) Push ends of paper clip through the holes in the disc and the math card. FIGURE Now the paper clip acts as a center hub for the math card s disc. SneakyMath_printer.indd